Calorimetrically determined log K, ΔH°, and ΔS° values for the interaction of sulphate ion with several bi- and ter-valent metal ions

Abstract

Calorimetrically determined log K, ΔH°, and ΔS° values valid in aqueous solution at 25° and zero ionic strength are reported for the interaction of SO₄^2– with Mg²⁺, Ca²⁺, Mn²⁺, Fe²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Cd²⁺, Al³⁺, Ga³⁺, ln³⁺, Sc³⁺, Y³⁺, La³⁺, Ce³⁺, Pr³⁺, Nd³⁺, Sm³⁺, Eu³⁺, Gd³⁺, Tb³⁺, Dy³⁺, Ho³⁺, Er³⁺, Tm³⁺, Yb³⁺, and Lu³⁺. The results are compared with predictions of electrostatic theory and with the results of reaction rate studies.